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DCLG House Prices – DCLG is an acronym standing for the Department of Communities and Local Government. The DCLG issues a monthly survey on housing price trends based on actual sales within the month.

Day Trader – A trader who buys and sells or otherwise takes multiple positions between the opening and closing of a single trading day. Day traders seek to take advantage of market fluctuations during the course of the day.

Dealer – An entity that buys and sells positions to traders as the counterparty in the transaction. A dealer is in contrast to a broker who simply arranges the trade as a third party between party and the counterparty. Dealers assume risk in the trade by accepting the trade themselves.

Decision-Support Tool – A tool or application that developed to provide reliable information and objective opinions before completing a trade. Decision-support tools are an effective way to minimize risk and increase potential profit. Such tools are often made available to traders by brokers or dealers in addition to or as part of their trading platform.

Deficit – A deficit is a negative balance on an account or on a single trade.

Delivery – A trade in which the actual currency or financial instrument changes hands from the seller to the buyer in situations where the trade is not closed before settlement.

Depreciation – When a currency or asset falls in value, it is in a state of depreciation.

Derivative – A derivative is a contract that may change in value depending on the movement of the underlying security or asset. The most commonly used type of derivative is the option.

Devaluation – Devaluation is the purposeful lowering of the value of a currency by a government or central bank. This adjustment is usually preceded by an official announcement.

Directional Quality – Directional trading is another term for simple investing, buying on the belief of rising prices or rates and selling on the belief of falling prices or rates. Directional quality is the strength of the direction in which the trader wants the currency or investment to move.

Discount Rate – A below-market interest rate charged to financial institutions when a short-term loan is issued directly from the central bank.

Dollar Rate – The dollar rate most often refers to a the rate of a currency against the U.S. dollar, but it can mean another dollar currency, such as the Australian dollar, if using the term does not cause confusion.